PC-Progress Discussion Forums

The S-Shape parameters are calculated directly from the values provided for the Threshold & Slope function of Maas [1990]. J.

Indeed, HYDRUS assumes that specific storage is equal to zero and thus the hydraulic capacity for the saturated zone is equal to zero as well. I have my own version of HYDRUS-2D that can consider nonzero specific storage (and thus the hydraulic capacity for the saturated zone as well). However, I ha...

You need to enter the “Observation Node Number”, not the FE Node Number. I would assume that this should be clear looking at any inverse problem example provided with the software. J.

While the HYDRUS GUI allows maximum 250 Print Times, the computational module itself allows 1000 print times. Thus you can manually update the Selector.in file (continuing with the same formatting) and the run directly the computational module h1d_calc.exe. If you insist on 6000 Print Times, then yo...

I’m currently traveling in Europe and do not have time to look at your project again. However, I recall that you used the Dirichlet BC for solute transport. That is almost always a wrong selection since then you cannot control the dispersive flux, which may be directed either in or out of the domain...

Hi Naomi, You state this: " For no apparent reason, the cycle of flux from atmospheric boundary grow to two years - 730 days. The different between the two years is one order (in odd years the biggest flux is -0.03 m/day, in double years the biggest flux is -0.17 m/day)." Are you looking at the Boun...

There is no need to turn anything off. When the initial conditions are given in non-negative pressure heads and the boundary conditions do not cause unsaturated conditions, the problem to be solved will be fully saturated. See all those verification examples for solute transport (e.g., Test3 through...

If you post your project, I will have a look at it. Otherwise, I have no useful comments. J.

I'm not involved in the distribution of the software and cannot thus answer such questions. I do not think there is. J.

You can download all the examples that I have mentioned, as well as the demo of Version 3 of HYDRUS (so that you can view these examples). Note that we have also uploaded much more complex "Drywell" examples (https://www.pc-progress.com/en/Default.aspx?h3d2-lib-Drywell), in which we use this new spe...

There is an upgrade fee to upgrade from Version 2.x to Version 3.x. J.

The use of the HYDRUS software requires its users to have a certain level of knowledge of basic terms, such as molecular diffusion, dispersion, degradation, conductivity. There are standard textbooks explaining these topics (including Soil Physics with HYDRUS (https://www.pc-progress.com/en/Default....

Although I think that FAQ17 was quite clear (considering that many HYDRUS users have been using this information successfully), I have nevertheless updated the text and tried to make it even more clear. J.

What type of boundary conditions are you using when modeling the well? Are you using the newly-implemented Reservoir BC (in Version 3 of HYDRUS (2D/3D))? See its description in Šimůnek, J., M. Šejna, and M. Th. van Genuchten, New features of the version 3 of the HYDRUS (2D/3D) computer software pack...